Human beings, each considered as a single actor within society
  • Jackson, Andrew - Seventh President of the United States
  • Jacobs, Jane - 20th century American/Canadian writer, author of The Death and Life of Great American Cities
  • Jay, John - First Chief Justice of the United States, co-author of the Federalist Papers
  • Jefferson, Thomas - Author of the Declaration of Independence, third President of the United States
  • Jillette, Penn - Taller, louder half of Penn and Teller magician duo
  • Johnson, Andrew - Seventeenth President of the United States
  • Johnson, Charles W. - Web developer, left-libertarian writer, student of philosophy
  • Johnson, Gary E. - 2016 and 2012 Libertarian Party U.S. presidential candidate, former governor of New Mexico (1995-2003)
  • Johnson, Lyndon B. - Thirty-sixth President of the United States
  • Johnson, Paul - British historian and prolific author
  • Jongen, Hubert - President of Libertarian International and Libertarisch Centrum
  • Journalists - Writers and editors of newspapers, magazines and other media